Pulsed electric discharge has been used for the removal of iron colloid substances from aqueous solutions. The residual concentration of organic substances in aqueous solution depends on the pulse repetition rate. The maximum decrease in organic substances concentration was observed at the pulse repetition rate of 800 pps. Comparison of the results obtained for iron colloid solutions containing humic substances and solutions of humic subtances with no colloids shows that the highest removal efficiency of organic substances was obtained when no iron and silicon ions were present in the solution. The results of our experiments suggest that pulsed electric discharge treatment for the removal of organic substances from natural waters is more efficient at an after-treatment stage, after precipitation of colloid substances.

This paper reports about results describing the mechanism of oxidation-reduction reactions occurring in the microwave plasma interaction with organic compounds solutions. Air and argon were used as the plasma gases in the experiments on disrupture of aqueous liquid organic compounds. Application of inversible redox indicator of methylene blue (MB) showed that disrupture of organic substances in microwave plasma was based on redox reactions. It was found that MB highest efficiency in the solution took place when air plasma-supporting gas was used.

The paper reports on the interaction of an electric discharge with solutions of organic substances in the electric reactor with iron loading. A colored water solution of organic substances with well-studied properties such as methylene blue (MB), furatsilin and eosin is used. The chosen organic substances allow to demonstrate the redox reactions, destruction of organic substances and their adsorption. It is found out that the process of direct interaction of organic substances with the discharge is 40%. Efficiency of sorption processes on iron load depends on the properties of the dissolved organic substances and for the MB is 21%, for furatsilin is 42% and for eosin is 63%. Post-effects have been observed after the action of the discharges and have shown activity for 24 hours. The obtained results allow modeling the mechanism of transformation of complex organic compounds e.g. humic substances or oil products.

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